Where does “छत्त्रक” come from?

छत्त्रक (Sanskrit) comes from Sanskrit -क, from Proto-Indo-Aryan *-kas.

Ancestry of “छत्त्रक”, step by step

StepLanguageWordMeaning
1Sanskrit-कdoer, maker
2Proto-Indo-Aryan*-kas—
Every word from Proto-Indo-Aryan *-kas →Every word from Sanskrit -क →